I'm a big college football guy, so my examples are going to be CFB-heavy, but when does a rivalry become so one-sided that it's not really a rivalry any more? I mean, before 2004, I'd say the Red Sox-Yankees rivalry wasn't really a rivalry. Yankees fans just kind of tolerated and laughed at Sox fans. When only one side really has a burning passion, that's not really a rivalry, that's just hatred. Since then, of course, it's become a bit more two-sided. With Ohio State-Michigan, the John Cooper years at Ohio State were clearly Michigan-ascendant, and the Tressel years have been tOSU-ascendant. That's a rivalry with long runs in favor of one team or the other. But I'd say ND-Army (or -Navy) is a pretty dead "rivalry". Yeah, they play each other every year, but it's not like Army is putting up any kind of a fight, you know? I don't know if Army even gets up for that game any more, really. It's just a scheduled butt-whuppin'. At what point is a rivalry just, you know, dead? That you just don't care about the other guy?